
37B-62
MR-372-J84-37B000$504.mif
V11
ELECTRONIC PARKING BRAKE
Fault finding – Interpretation of faults
FPA  
Vdiag No.: 0C, 04, 08, 
0D, 11
37B
DF054
PRESENT
OR
STOREDBATTERY VOLTAGE TOO HIGH
1. DEF: Battery voltage too high
NOTESPriorities when dealing with a number of faults:
Deal first with faults DF003 (1.DEF; 2.DEF), DF004, DF028, DF029, DF041, DF042, 
DF043, DF050, DF057, DF058 and DF073.
Conditions for applying the fault finding procedure to a stored fault:
Apply this fault finding procedure if the fault appears as present again after the ignition 
has been switched on 
(forced + after ignition feed, see Introduction).
Special notes:
The fault does not usually come from the electronic parking brake computer.
This fault appears as present if the computer supply voltage is greater than 16.5 V, 
and becomes stored when the voltage goes back down below 15.7 V.
Note:
Using another battery for a boost when starting may trigger this fault.
Only for Vdiag 08, 0C and 0D.
If there is a stored fault, refer to the statuses and parameters when it appears.
Explanation of counters: see Introduction.
If the fault is stored and PR018 = 0 and PR022 > 25, clear the fault:
do not take this fault into account.
Check the charging circuit: the alternator should not supply a voltage of less than + 12 V or greater than + 14.4 V 
(engine at idle speed).
Check the alternator and the regulator.
Carry out the necessary repairs.
If the fault is still present, check that no electrical system using the same supply fuse as the electronic parking 
brake computer is faulty.
If the fault persists, contact the Techline.
AFTER REPAIRIf the computer has been replaced (at the request of the Techline), initialise the 
electronic parking brake computer (see Replacement of components).
Issue several braking and release commands to confirm the repair.
Deal with any other faults.
FPA_V0C_DF054/FPA_V04_DF054/FPA_V08_DF054/FPA_V0D_DF054/FPA_V11_DF054 

37B-64
MR-372-J84-37B000$504.mif
V11
ELECTRONIC PARKING BRAKE
Fault finding – Interpretation of faults
FPA  
Vdiag No.: 0C, 04, 08, 
0D, 11
37B
DF055
CONTINUED
2. DEF
NOTESSpecial notes:
This fault is generated after the automatic parking brake is 
switched on whilst driving or following an internal reset. 
With the anti-lock braking system, this detection is active at 
> 0.6 mph (> 1 km/h), otherwise the multiplex signal 
emitted by the injection computer must be 1.
Note:
The driver is only informed of this fault after 16 successive 
detections.
This fault may be due to battery disconnections or vehicle 
supply faults, in which case it is associated with fault 1.DEF 
(battery voltage too low) dealt with previously.
If the frequency counter (PR016) > 3 and if the onboard network (battery, wiring) analysis does not bring up any 
present or stored fault under battery voltage, contact the Techline.
Check that the battery, battery - starter - alternator connection lead, battery earth - chassis lead and the chassis 
earth - engine and transmission assembly lead are in good condition.
Repair if necessary.
Check the charging circuit: the alternator should not supply a voltage of less than + 12 V or greater than + 14.4 V 
(engine at idle speed).
Carry out the necessary repairs.
track H4
(except Laguna II, Vel Satis and Espace IV)
track G4+12V
track H2
(except Laguna II, Vel Satis and Espace IV)
track G2earth
Repair if necessary (see the vehicle wiring diagram).
If the fault is still present, check that no electrical system using the same supply fuse as the electronic parking 
brake computer is faulty.
If the fault persists, contact the Techline.
AFTER REPAIRIf the computer has been replaced (at the request of the Techline), initialise the 
electronic parking brake computer (see Replacement of components).
Issue several braking and release commands to confirm the repair.
Deal with any other faults. 

37B-69
MR-372-J84-37B000$504.mif
V11
ELECTRONIC PARKING BRAKE
Fault finding – Interpretation of faults37B
DF059
CONTINUED
Use the diagnostic tool to carry out a multiplex system test.
This check ensures that the various multiplex system connections are correct and finds any faulty segments.
Carry out any necessary repairs.
If the multiplex network test did not find the faulty connection, carry out a conformity check to check that the 
status from the Protection and Switching Unit computer is present and correct (ET016, PR015, PR017).
Check the gearbox contacts.
If the status and parameters shown here are not correct, carry out fault finding on the Protection and Switching 
Unit (see 87G, Engine compartment connection unit).
If the fault is still present, disconnect the Protection and Switching Unit computer connector to check that the 
connector and its clips (terminals) are in good condition, especially the multiplex track clips (see the wiring 
diagram of the Protection and Switching Unit fitted to the vehicle). 
Replace the clips if necessary.
If the fault persists, contact the Techline.
AFTER REPAIRIf the computer has been replaced (at the request of the Techline), initialise the 
electronic parking brake computer (see Replacement of components).
Issue several braking and release commands to confirm the repair.
Deal with any other faults.
FPA
Vdiag No.: 0C, 08, 0D, 
11 

37B-78
MR-372-J84-37B000$576.mif
V11
FPA 
Vdiag No.: 0C, 04, 08, 
0D, 11ELECTRONIC PARKING BRAKE
Fault finding – Conformity check37B
SUB-FUNCTION: AUTOMATIC APPLICATION
NOTESOnly carry out this conformity check after carrying out a complete check using the 
diagnostic tool.
Application conditions: ignition on (forced + after ignition, see Introduction)
Note:
The interpretation of these statuses and parameters is only valid with the 
ignition switched on, the statuses and parameters displayed in blue on the 
diagnostic tool is information supplied by other computers, which are transmitted via 
the multiplex network. If these variables display inconsistent values, check that the 
multiplex system test has not shown up any faulty connections. Repair the faulty 
multiplex connections before looking for a possible problem with the signals.
Each sub-function in this test is associated with a Fault finding chart.
Special notes 
The diagnostic tool may display the message Computer busy when displaying 
statuses and parameters. This message is displayed when the parking brake is 
applying or releasing the brake, because the computer gives priority to controlling the 
motor before transmitting variables. If this message is displayed, exit the current 
screen and then return to it.
Order FunctionParameter or Status 
Checked or ActionDisplay and notes Fault finding
1Assisted 
braking 
configurationET022:Automatic 
braking 
configurationWITH or WITHOUTDepending on the customer's 
request, the electronic parking 
brake computer may be 
configured WITH or WITHOUT 
assisted braking when the 
engine stops. Refer to the 
interpretation of status ET022 
Automatic braking 
configuration.
2Computer 
electrical supplyET001:+ After ignition 
feedIgnition off: ABSENT
Ignition on: PRESENTIn the event of a fault on this 
status, refer to the interpretation 
of status ET001: + after ignition 
feed.
3EnginePR015:Engine speed0rpmIn the event of a fault with this 
parameter and these statuses, 
make sure that the injection 
computer is in fact sending 
signals (absence of faults DF036 
No injection multiplex 
transmission and DF052 
Multiplex network).
If the fault is still present, run 
fault finding on the injection 
computer (see 13B, Diesel 
injection or 17B, Petrol 
injection). ET019:EngineSTOPPED 
Other possibilities 
depending on the 
operating status of the 
engine:
RUNNING
- UNDER STARTER
- STALLED 

37B-85
MR-372-J84-37B000$576.mif
V11
FPA 
Vdiag No.: 0C, 04, 08, 
0D, 11ELECTRONIC PARKING BRAKE
Fault finding – Conformity check37B
SUB-FUNCTION: AUTOMATIC RELEASE (CONTINUED 4)
NOTESOnly carry out this conformity check after carrying out a complete check using the 
diagnostic tool.
Application conditions: ignition on (forced + after ignition, see Introduction)
Note:
The interpretation of these statuses and parameters is only valid with the 
ignition switched on, the statuses and parameters displayed in blue on the 
diagnostic tool is information supplied by other computers, which are transmitted via 
the multiplex network. If these variables display inconsistent values, check that the 
multiplex system test has not shown up any faulty connections. Repair the faulty 
multiplex connections before looking for a possible problem with the signals.
Each sub-function in this test is associated with a Fault finding chart.
Special notes 
The diagnostic tool may display the message Computer busy when displaying 
statuses and parameters. This message is displayed when the parking brake is 
applying or releasing the brake, because the computer gives priority to controlling the 
motor before transmitting variables. If this message is displayed, exit the current 
screen and then return to it.
Order FunctionParameter or Status
Check or ActionDisplay and
NotesFault finding
8EnginePR015:Engine speed0rpmIn the event of a fault with this 
parameter and these statuses, 
make sure that the injection 
computer is in fact sending 
signals (absence of faults 
DF036 No injection multiplex 
transmission and DF052 
Multiplex network).
If the fault is still present, run 
fault finding on the injection 
computer (see 13B, Diesel 
injection or 17B, Petrol 
injection). ET019:EngineSTOPPED
Other possibilities 
depending on the operating 
status of the engine:
- RUNNING
- UNDER STARTER
- STALLED (in the event 
where the engine is not 
stopped in the normal way) 

37B-89
MR-372-J84-37B000$576.mif
V11
FPA 
Vdiag No.: 0C, 04, 08, 
0D, 11ELECTRONIC PARKING BRAKE
Fault finding – Conformity check37B
SUB-FUNCTION: EMERGENCY BRAKING
NOTESOnly carry out this conformity check after carrying out a complete check using the 
diagnostic tool.
Application conditions: ignition on (forced + after ignition, see Introduction)
Note:
The interpretation of these statuses and parameters is only valid with the 
ignition switched on, the statuses and parameters displayed in blue on the 
diagnostic tool is information supplied by other computers, which are transmitted via 
the multiplex network. If these variables display inconsistent values, check that the 
multiplex system test has not shown up any faulty connections. Repair the faulty 
multiplex connections before looking for a possible problem with the signals.
Each sub-function in this test is associated with a Fault finding chart.
Special notes 
The diagnostic tool may display the message Computer busy when displaying 
statuses and parameters. This message is displayed when the parking brake is 
applying or releasing the brake, because the computer gives priority to controlling the 
motor before transmitting variables. If this message is displayed, exit the current 
screen and then return to it.
Order FunctionParameter or Status 
Checked or ActionDisplay and notes Fault finding
1EngineET019:EngineSTOPPED
Other possibilities 
depending on the 
operating status of the 
engine:
- RUNNING
- UNDER STARTER
- STALLEDIn the event of a fault with this 
status, check that the injection 
computer is sending the signal 
correctly (absence of faults DF036 
No injection multiplex signal 
and DF052 Multiplex network).
If the fault is still present, run fault 
finding on the injection computer 
(see 13B, Diesel injection or 
17B, Petrol injection).
2Wheel speedsPR012:Vehicle speedX = 0 mph (km/h)In the event of a fault with these 
parameters, check that the anti-
lock braking system computer is 
sending the signals correctly 
(absence of faults DF037 No ABS 
multiplex signal and DF052 
Multiplex network). If the fault is 
still present, run fault finding on 
the anti-lock braking system 
computer (see 38C, Anti-lock 
braking system). PR013:Rear left-hand 
wheel speedX = 0 mph (km/h)
PR014:Rear right-hand 
wheel speedX = 0 mph (km/h) 

37B-93
MR-372-J84-37B000$648.mif
V11
ELECTRONIC PARKING BRAKE
Fault finding – Status summary table
FPA 
Vdiag No.: 0C, 04, 08, 
0D, 11
37B
Tool status Diagnostic tool title
ET001+ After ignition supply
ET008Manual control: brake application switch
ET009Redundant braking switch position
ET010Manual control: brake releasing switch
ET011Parking brake
ET014Door opening switches
ET016Manual gearbox lever position
ET017Reverse gear engaged
ET018Automatic gearbox lever position
ET019Engine
ET022Automatic braking configuration
ET024System operation
ELECTRONIC PARKING BRAKE
Fault finding – Status summary table
MR-372-J84-37B000$648.mif 

37B-97
MR-372-J84-37B000$720.mif
V11
37B
ELECTRONIC PARKING BRAKE
Fault finding – Parameter summary table
Tool parameterDiagnostic tool title
PR001Battery voltage
PR003Slope value
PR004Measured force value
PR005Force setting
PR006Clutch pedal position
PR012Vehicle speed
PR013Rear left-hand wheel speed
PR014Rear right-hand wheel speed
PR015Engine speed
PR017Accelerator pedal position
FPA
Vdiag No.: 0C, 04, 08, 
0D, 11
MR-372-J84-37B000$720.mif